Boom 黏土热-力耦合弹塑性损伤模型研究

Xiang Ling Li, Zhe Gong, Wei-zhong Chen, Hongdan Yu, Yong-Shang Ma, Hong-ming Tian

    Research outputpeer-review


    Study of the coupled thermo-mechanical constitutive model of clays is an important issue in several specific fields, especially in the analysis of nuclear waste isolation. Based on the results of undrained triaxial tests on Boom clay at different temperatures, a coupled thermo-mechanical elastoplastic damage model is established. The yield surface is based on that of the Drucker-Prager cap model. A hardening law and a thermal/mechanical damage evolution equation are presented. The developed model is implemented into ABAQUS finite element code through subroutine USDFLD. Model parameters of Boom clay are then calibrated from experimental results by back analysis. Three dimensional coupled THM modeling of ATLAS III in-situ heating tests in HADES at the HADES underground research facility is performed by the proposed constitutive model. The numerical results are in agreement with in situ measurements, demonstrating that the model can reasonably depict the main features of thermo-mechanical behaviors of Boom clay.
    Translated title of the contributionA thermo-mechanical coupled elastoplastic damage model for Boom clay
    Original languageChinese
    Pages (from-to)2433-2442
    Number of pages10
    JournalRock and Soil Mechanics
    StatePublished - 1 Sep 2016

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